Abstract
The study of temperature relaxation and ion acoustic wave excitation in localized regions of intense laser field (hot spots) has been carried out for the conditions of inhibited electron thermal transport. We consider the fast energy deposition in a single cylindrical hot spot and describe the following temperature and density relaxation using a perturbation approach and the nonlocal electron transport equations. We find a significant increase in the temperature relaxation time for hot spots with sizes comparable to the electron mean free path. Thermal decay of the hot spot together with the pondermotive effect of the laser field on ions could also be a source of large density fluctuations in currently exploited laser-produced plasmas.
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